riesp iresp reisp erisp iersp eirsp risep irsep rsiep sriep isrep sirep resip ersip rseip sreip esrip serip iesrp eisrp iserp sierp esirp seirp rieps ireps reips erips ierps eirps ripes irpes rpies pries ipres pires repis erpis rpeis preis epris peris ieprs eiprs ipers piers epirs peirs rispe irspe rsipe sripe isrpe sirpe ripse irpse rpise prise iprse pirse rspie srpie rpsie prsie sprie psrie ispre sipre ipsre pisre spire psire respi erspi rsepi srepi esrpi serpi repsi erpsi rpesi presi eprsi persi rspei srpei rpsei prsei sprei psrei espri sepri epsri pesri speri pseri iespr eispr isepr siepr esipr seipr iepsr eipsr ipesr piesr episr peisr isper siper ipser piser spier psier espir sepir epsir pesir speir pseir
Note: these 'words' (valid or invalid) are all the permutations of the word riesp. These words are obtained by scrambling the letters in riesp.